package com.lanou3g.farmdoctor.widget;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;

import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;

/**
 * Created by Chen fengYao on 2015/8/4.
 * 用于显示圆角矩形的ImageView
 */
public class RoundImageView extends ImageView{

    private Paint paint;

    public RoundImageView(Context context) {
        this(context,null);
    }

    public RoundImageView(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }

    public RoundImageView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        paint  = new Paint();//初始化画笔对象
    }

    /**
     * 绘制圆角矩形图片
     */
    @Override
    protected void onDraw(Canvas canvas) {

        Drawable drawable = getDrawable();
        if (null != drawable) {
            Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
           // Bitmap b = getRoundBitmap(bitmap, 30);
            Bitmap b = getCircleBitmap(bitmap);

            final Rect rectSrc = new Rect(0, 0, b.getWidth(), b.getHeight());
            final Rect rectDest = new Rect(0,0,getWidth(),getHeight());
            paint.reset();
            canvas.drawBitmap(b, rectSrc, rectDest, paint);


        } else {
            super.onDraw(canvas);
        }

    }



    private Bitmap getCircleBitmap(Bitmap bitmap){
        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
                bitmap.getHeight(),Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(output);
        Rect rect = new Rect(0,0,bitmap.getWidth(),bitmap.getHeight());

        paint.setAntiAlias(true);
        final int color = 0xffffffff;
        paint.setColor(color);//画笔颜色

        canvas.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2, bitmap.getHeight() / 2, paint);
        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
        canvas.drawBitmap(bitmap, rect, rect, paint);//将图片画出来

        return output;
    }
}
